Leaf spring



FIG. 1 is a perspective view of the leaf spring showing my new design;

FIG. 2 is a right side elevational view thereof, the left side being substantially a mirror image thereto;

FIG. 3 is a front end elevational view of the leaf spring as shown in FIG. 2, the rear end being substantially a mirror image thereto;

FIG. 4 is a bottom plan view of the leaf spring as shown in FIG. 2; and,

FIG. 5 is a top plan view of the leaf spring as shown in FIG. 2. 

The ornamental design for a leaf spring, as shown and described. 